Question

The site of intelligence, thinking in the human brain is-
A) Cerebrum
B) Medulla oblongata
C) Cerebellum
D) Midbrain

Answer 1

Hint: The prefrontal cortex (PFC) is the region of the brain which covers the frontal lobe. The prefrontal cortex is responsible for thought analysis and abstract thinking, and is also responsible for regulating behaviour.

Complete Answer:
The cerebrum contributes to a major part of the brain. It is divided into two parts by a deep longitudinal cleft, forming the right and left cerebral hemispheres. Both hemispheres are connected via nerve fibre tract known as corpus callosum. The covering of cerebrum is known as cerebral cortex, also called the grey matter due to concentration of neuron cell bodies in the region which is responsible for the coloured appearance. The cerebrum contains sensory areas, motor areas and a part which is neither completely sensory or motor in terms of functionality. In mammals, the prefrontal cortex (PFC) is the cerebral cortex. It is responsible for regulating behaviour and thinking processes including meditation, conflicts, making choices, and problem solving capacity, prediction of actions or events. The cerebrum also controls social control, such as communication, memory and inter-sensory association. It deals with most implicated qualities like consciousness, intelligence, and personality as it is responsible for analysing data received from the body's senses. Cerebrum also controls intense emotions and impulses.

Additional information:medulla oblongata controls respiration, gastric secretions and cardiovascular reflexes. Cerebellum provides additional space for incorporating more neurons. Midbrain contains cerebral aqueduct and lobes known as corpora quadrigemina.

Thus, the correct answer is option- ‘A’. Cerebrum.

Note:The frontal part of the cerebrum is involved in regulation of thoughts and actions involved in decision making. It is used in planning strategies, and for adjusting actions or reactions in various situations.